DENVER (CBS4) – Following questions and outrage about why former Arapahoe County Sheriff Pat Sullivan was never charged with any sex crimes following his videotaped confession, the Denver District Attorney’s Office has released a statement acknowledging it made the decision last month not to file sex-related charges against Sullivan.

In a videotaped confession to Arapahoe County investigators from Nov. 29, 2011, Sullivan seemed to make vague, sometimes wavering admissions that he may have had sex with minors. He told investigators he had used the “date rape” drug GHB on a cognitively impaired 34-year-old to have sex with the man and conceded he was guilty of sex assault on an at-risk adult.

Sullivan was never charged with sex assault on an at-risk adult or anything else emanating from that interview.

In a statement Tuesday to CBS4, the Denver District Attorney’s Office wrote, “The Denver Police Department extensively investigated the information provided by Pat Sullivan in the recorded statement he made to the Arapahoe County Sheriff’s Office. Specifically, Denver police detectives investigated matters that may have occurred in the city and county of Denver.

The Denver police investigation results were presented to the Denver District Attorney’s Office in early April 2012. The results of that investigation were reviewed by two senior level lawyers, as well as the District Attorney Mitch Morrissey.”

Allegations relating to controlled substances and possible sexual assault involving a minor could not be established as incidents that occurred in the city and county of Denver.”

The conclusion was that no criminal charges could be filed as there was no likelihood of conviction.”

Lynn Kimbrough, a spokesperson for Morrissey, said her office would decline further comment on its decision in the Sullivan case “based on ethical and statutory considerations.”